Question 17

Which number will replace the question mark (?) in the following series?
2, 4, 7, 12, 19, 30, ?

Solution

2, 4, 7, 12, 19, 30, ?
2+2=4

4+3=7

7+5=12

12+7=19

19+11=30

30+13=43

(2, 3, 5, 7, 11, 13) are prime numbers, so we are adding first number with first prime number and second with second prime number and so on.

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Which number will replace the question mark (?) in the following series?2, 4, 7, 12, 19, 30, ?